Fractal Audio Axe-Fx Ultra Vs. Axe-Fx II Comparison my band is recording a new album and we decided to make a few gear videos while being in studio. Here is a tone comparison between Axe Fx Ultra and II. All settings are the same. The guitar is Agile Pendulum dual pro 72527. I replaced the stock PUs to EMG 808 and added a killswitch. ﻿